Enzi says judges and lawyers seem to forget or discount that national parks are for the benefit and enjoyment of the people.

Barrasso said the ruling was another example of interventionist Washington judges legislating from the bench.

U.S. District Judge Emmet Sullivan in Washington, D.C. says the plan developed for Yellowstone would increase air pollution, disturb wildlife and allow too much noise.

The plan would have allowed 540 snowmobiles a day to go through Yellowstone, plus nearby Grand Teton National Park and the John D. Rockefeller Jr. Memorial Parkway. Conservationists sued to stop that plan, saying the plan allowed too many snowmobiles.